Get file size of PHAsset without loading in the resource? - swift

Question

Is there a way to get the file size on disk of a PHAsset without doing requestImageDataForAsset or converting it to ALAsset? I am loading in previews of a user's photo library - potentially many thousands of them - and it's imperative to my app that they know the size before import.

Answer 1

You can grab the fileSize of a PHAsset and convert it to human readable form like this:
let resources = PHAssetResource.assetResources(for: yourAsset) // your PHAsset
var sizeOnDisk: Int64? = 0
if let resource = resources.first {
let unsignedInt64 = resource.value(forKey: "fileSize") as? CLong
sizeOnDisk = Int64(bitPattern: UInt64(unsignedInt64!))
}
Then use your sizeOnDisk variable and pass it into a method like this...
func converByteToHumanReadable(_ bytes:Int64) -> String {
let formatter:ByteCountFormatter = ByteCountFormatter()
formatter.countStyle = .binary
return formatter.string(fromByteCount: Int64(bytes))
}

Answer 2

A safer solution:
[asset requestContentEditingInputWithOptions:nil completionHandler:^(PHContentEditingInput * _Nullable contentEditingInput, NSDictionary * _Nonnull info) {
NSNumber *fileSize = nil;
NSError *error = nil;
[contentEditingInput.fullSizeImageURL getResourceValue:&fileSize forKey:NSURLFileSizeKey error:&error];
NSLog(#"file size: %#\nerror: %#", fileSize, error);
}];
Swift version:
asset.requestContentEditingInput(with: nil) { (contentEditingInput, _) in
do {
let fileSize = try contentEditingInput?.fullSizeImageURL?.resourceValues(forKeys: [URLResourceKey.fileSizeKey]).fileSize
print("file size: \(String(describing: fileSize))")
} catch let error {
fatalError("error: \(error)")
}
}
Inspired by How to get an ALAsset URL from a PHAsset?

Answer 3

Please try this.
let resources = PHAssetResource.assetResources(for: YourAsset)
var sizeOnDisk: Int64 = 0
if let resource = resources.first {
let unsignedInt64 = resource.value(forKey: "fileSize") as? CLong
sizeOnDisk = Int64(bitPattern: UInt64(unsignedInt64!))
totalSize.text = String(format: "%.2f", Double(sizeOnDisk) / (1024.0*1024.0))+" MB"
}

Answer 4

SWIFT 5.0
Light & Easy:
private static let bcf = ByteCountFormatter()
func getSize(asset: PHAsset) -> String {
let resources = PHAssetResource.assetResources(for: asset)
guard let resource = resources.first,
let unsignedInt64 = resource.value(forKey: "fileSize") as? CLong else {
return "Unknown"
}
let sizeOnDisk = Int64(bitPattern: UInt64(unsignedInt64))
Self.bcf.allowedUnits = [.useMB]
Self.bcf.countStyle = .file
return Self.bcf.string(fromByteCount: sizeOnDisk)
}